package com.nowcoder.community.entity;

/**
 * 封装分页相关的信息
 *
 */
public class Page {
    //当前的页码
    private int current=1;
    //显示上限
    private int limit=10;
    //数据总数 用于计算总页数
    private int rows;
    //查询路径（用来复用分页链接）
    private String path;

    public int getCurrent() {
        return current;
    }

    public void setCurrent(int current) {
        if(current>=1)
        this.current = current;
    }

    public int getLimit() {

        return limit;
    }

    public void setLimit(int limit) {
        if(current>=1&&limit<=100)
        this.limit = limit;
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if(rows>=0)
        this.rows = rows;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }
    //获取当前页的起始行
    public int getOffset(){
        //current*limit-limit
        return (current-1)*limit;
    }
/**
 * 获取总的页数
 *
 * @return
 */
 public int getTotal(){
     //rows/limit[+1]
     if(rows%limit==0){
         return rows/limit;
     }else{
         return rows/limit+1;
     }
 }

 //获取起始页码
 public int getFrom(){
    int from=current -2;
    return from<1?1:from;
 }
 //获取终止页码
 public int getTo(){
     int to=current+2;
     int total=getTotal();
     return to>total?total:to;}

}
